﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class Class1
    {
        public int r { get; set; }
        public int a { get; set; }
        public int b { get; set; }
        public double Size(int r)
        {
            double size = 3.14 * r * r;
            return size;
        }
        public double Size(int a, int b)
        {
            double size = a * b;
            return size;
        }
    }
}
